Variable attenuation electro-optic device

Details Variable attenuation electro-optic device Variable attenuation electro-optic device

1980-08-25

1982-12-21

Corbin, John K.

350 9615, 350338, 350413, 350448, G02F 113

Patent

active

043646395

ABSTRACT:
A variable attenuation electro-optic device has a lens for collimating light from an input fiber and for focussing light into an output fiber. The optical path of light passing through the device passes through a dynamic scattering liquid crystal cell whose optical transmissivity can be varied by varying an AC electric field applied across it. Reflective and transmissive embodiments are described using one or two lenses of the Selfoc.RTM. type. The applied AC introduces a frequency component into the attenuation which is suppressed to particularly adapt the device for use as an attenuator or enhanced and modulated to particularly adapt the device for use as a modulator.

REFERENCES:
patent: 3784280 (1974-01-01), Bigelow
patent: 3881806 (1975-05-01), Suzuki
patent: 3882039 (1975-05-01), Sprokel
patent: 3972589 (1976-08-01), Shelly et al.
patent: 4208094 (1980-06-01), Tomlinson et al.

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